It is very annoying to see the message "This copy of the Install OS X Mavericks application can't be verified. It may have been corrupted or tampered with during downloading." when you try to install old releases of Apple OS X operating systems such as Mountain Lion, Mavericks, Yosemite etc. If you are trying to install OS X Mavericks as virtual machine in VMWare fusion or in physical system, then follow below steps to successfully install the operating system. In VMWARE Fusion. Create a OSX Mavericks VM by attaching OSX Mavericks Installer to the virtual machine.Do not Poweron the virtual machine. If powered on automatically after 1st step above then poweroff the VM.Open Virtual Machine Settings, Goto Advanced Section.Un check "Synchronize Time" setting.Start the Virtual Machine to install the OSX Mavericks.In the OSX Installer app , Launch Terminal.app.Set the system date to old date as date 102613152013 (Oct/26/2013 13:15).Quit the Terminal application.Conti…